Lightning-arrester.



No. 805,439. PATENTED NOV. 28, 1905.

A. J. BERRY. LIGHTNING ARRESTBR.

APPLICATION FILED PEB.25,1905.

W ATM a 7 tudinal section of a modification.

PATENT OFFICE.

ARTHUR J. BERRY, OF MARION, OHIO.

LlGHTNING-ARRESTER.

Specification of Letters Patent.

Patented Nov. 28, 1905.

Application filed February 25, 1905. Serial No. 247,324.

To all 7.077107% it Uta/y concern:

Beit known that I, ARTHUR J. BERRY, a citizen of the United States,residing at Marion, in the county of Marion and State of Ohio,

have invented certain new and useful Improvements inLightning-Arresters, of which the following is a specification.

This invention provides a novel form of arrester for relieving telegraphand telephone lines of abnormal charges of electric fluid due tolightning or static charges, the same being of such construction as toprovide a small air-gap, a large area of arcingsurfaces, and a number ofarcing-spaces, said arcing surfaces and spaces being preferablyparallel.

For a full description of the invention and the merits thereof and alsoto acquire a knowledge of the details of construction of the means foreffecting the result reference is to be had to the following descriptionand accompanying drawings.

While the invention may be adapted to different forms and conditions bychanges in the structure and minor details without departin from thespirit or essential features thereo still some of the preferred embodiments are shown in the accompanying drawings, in which Figure 1 is acentral longitudinal section of a lightning-arrester embodying theinvention. Fig. 2 is a transverse section on the line a: :1: of Fig. 1.Fig. 3 is a central longi- Fig. 4 is a cross-section on the line y y ofFig. 3.

Corresponding and like parts are referred to in the followingdescription and indicated in all the views of the drawings by the samereference characters.

The arrester comprises a series of concentric tubes electricallyinsulated from one another, the tubes of one series being electricallyconnected with the line to be protected and the remaining tube or tubesgrounded, the tubes being arranged so as to have a comparatively smallair space or gap between them for tne passage of the spark when the lineis abnormally charged. The drawings illustrate two tubes, although thisnumber may be increased within the purview of the invention, so long asthe tubes of one set are electrically insulated from the tubes of theother set.

The tubes 1 and 2 have a concentric arrangement to provide an air-space3 of uniform diameter throughout its length. The tubes. are electricallyinsulated by plugs 4,

fitted to the ends thereof, each being of a stepped structure, wherebyshoulders 5 and 6 are provided to receive the ends of the tubes 2 and 1.The outer ends of the plugs are flanged, as shown at 7, to provide headsto limit the relative movement of the plugs and tube 1 and to space theline-wire 8 from the outer tube 1 a sufficient distance. A jumper-wire 9connects the arrester with the line-wire 8. As shown in Fig. 1, thejumperwire 9 is deflected intermediate of its ends and electricallyconnected to the inner tube 2, and its end portions are twisted aboutthe line-wire 8, thereby establishing electrical connection between theline-Wire and a set of tubes. In the construction shown in Fig. 3 theline-wire S is in direct contact with the tube 1, and the jumper-wire 9serves simply as a binder or connecting means between the arrester andthe line-wire. In either case the jumper-wire passes through openings 10in the plugs 4 of insulating material, and the projecting ends are bentso as to engage with the outer ends of the plugs to hold the latter inplace, thereby preventing separation or dismemberment of the arresterwhen not in service after the parts have been properly assembled.

As shown in Fig. 1, the outer tube 1 is grounded by the connection 11,and, as indi cated in Fig. 3, the inner tube 2 is grounded by the wireor connection 11, which passes through openings 12 of the plugs 4 andformed into a loop. In the latter construction the plugs at are doublysecured by the jumper-wire 9 and the grounding-wire 11.

Notches 13 are formed in the edges of the heads or outer flanges 7 ofthe plugs to provide seats for the wires 8 and 11, thereby preventingpossible movement or displace ment of the arrester after being placed inposition upon the line-wire to be protected.

The employment of the tubes results in the provision of a large area ofarcing-surface, and by having the tubes spaced apart a short distance acomparatively small air-gap is had for the passage of abnormal chargesof the electric liuid should the line-wire become abnormally chargedeither by lightning or from other cause which would result disastrouslyto the instruments connected with the line. As a result of theconstruction disclosed the arrester may be applied to a linewire withoutnecessitating cutting thereof, and after the arrester has been placed inposition it does not require further attention,

IIO

since the parts are closed by the plugs 4c and there is no occasion forcleanin the elements, the tubes constituting the arcing-surfaces. Theconcentric arrangement of the tubes results in having thearcing-surfaces uniformly spaced and disposed in parallel relation,both. of which features are necessary to the efficiency of the device.

Having thus described the inventiornwhat is claimed as new is- 1. Alightning-arrester comprising concentric tubes, and plugs of insulatingmaterial closing the ends of said tubes'and supporting them in fixedrelation, and having outer flanges notched in their edges to provideseats to properly position the cooperating wires.

2. A lightning-arrester comprising concentric tubes, plugs of insulatingmaterial closing the ends of the tubes and supporting the latter infixed relation, and a Wire having its end portions passed throughopenings of the plugs and bent against the outer ends thereof to retainthe plugs in position.

3. A lightning-arrester comprising concentric tubes, plugs of insulatingmaterial closing the ends thereof and holding the tubes in fixedposition, and a jumper-wire passed. through openings of the plugs andhaving its end portions bent to engage with the outer ends of said plugsto hold them in place and serving as means for securing the arrester tothe line-wire.

4.. A lightning-arrester comprising concentric tubes, plugs ofinsulating material closing the outer ends of the tubes and supportingthe same in determinate position, a jumperwire for securing the tubesand plugs together and serving to connect the arrest-er to theline-wire, and a ground connection electrically connected with one ofsaid tubes.

In testimony whereof I aHlX my signature in presence of two witnesses.

